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author | Christian Borntraeger <borntraeger@de.ibm.com> | 2008-03-25 18:47:31 +0100 |
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committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 12:00:46 +0300 |
commit | 5288fbf0ef041ba0e8b4dcb2df4536b5e3a48b32 (patch) | |
tree | 6f81a87294c9026ac91a84e5a94e55e565002d3b /include/linux/kvm.h | |
parent | 453423dce2785b8e22077e3b3eeecb4f60fe3470 (diff) | |
download | linux-stable-5288fbf0ef041ba0e8b4dcb2df4536b5e3a48b32.tar.gz linux-stable-5288fbf0ef041ba0e8b4dcb2df4536b5e3a48b32.tar.bz2 linux-stable-5288fbf0ef041ba0e8b4dcb2df4536b5e3a48b32.zip |
KVM: s390: interprocessor communication via sigp
This patch introduces in-kernel handling of _some_ sigp interprocessor
signals (similar to ipi).
kvm_s390_handle_sigp() decodes the sigp instruction and calls individual
handlers depending on the operation requested:
- sigp sense tries to retrieve information such as existence or running state
of the remote cpu
- sigp emergency sends an external interrupt to the remove cpu
- sigp stop stops a remove cpu
- sigp stop store status stops a remote cpu, and stores its entire internal
state to the cpus lowcore
- sigp set arch sets the architecture mode of the remote cpu. setting to
ESAME (s390x 64bit) is accepted, setting to ESA/S390 (s390, 31 or 24 bit) is
denied, all others are passed to userland
- sigp set prefix sets the prefix register of a remote cpu
For implementation of this, the stop intercept indication starts to get reused
on purpose: a set of action bits defines what to do once a cpu gets stopped:
ACTION_STOP_ON_STOP really stops the cpu when a stop intercept is recognized
ACTION_STORE_ON_STOP stores the cpu status to lowcore when a stop intercept is
recognized
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include/linux/kvm.h')
0 files changed, 0 insertions, 0 deletions